feat: updates for artifactapi

messed up migration from terraform -> argocd, missed some remotes. need
to backtrack a bit

- remove replicas (rely on horizontal-pod-scaler)
- add raw.githubusercontent.com remote
- change links to github_raw to native github.com (temporary)

clusters/au-syd1/bootstrap/kustomization.yaml

@@ -3,7 +3,7 @@ apiVersion: kustomize.config.k8s.io/v1beta1
 kind: Kustomization
 
 resources:
-  - https://artifactapi.k8s.syd1.au.unkin.net/api/v1/remote/github_raw/argoproj/argo-cd/refs/tags/v3.3.2/manifests/ha/install.yaml
+  - https://raw.githubusercontent.com/argoproj/argo-cd/refs/tags/v3.3.2/manifests/ha/install.yaml
   - au-syd1-apps.yaml
 
 patches: